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To` all @am t cabecera *VBeitlinown thatzIyMATTHEw SPEAR, of "Bowdoinham, inthe county otSagadohoc Improvements in` the Improved: MiterfBox, for'ffwhich `Letters Patent- No. y10,936` were `grar'rted to fmeon the 116th dayV ot' May, `1854 Ido herebydeclare that the same is fully `desCribed i and represented sin* the following specification and` the j accompanyingidraw-` ings, "letters, `figures;` and,` references thereof.

1 topviewyotmy new or improved miter box i asityappears when entirelyzopen. i Fig. 2 is aafront `elevationyof theasame. Fig.` 3 `is a rear elevation. "Figneistopview as appears 1; with i. fits tu :edge i supporters removed., I7i,`g`.` :53 is aytransverse: section of "ene of the edgewsupporters. FigyGgis "inner edge view` of the "said,` edgefsu'pporter.v Y

. patented consistedifin two supportersfmav, f connected` anditurning` ab u common cen-` tergzin combinationy 'th aw" guide, d, at-` j, ftached 1, to .I the. l same" ivoty or j center." i' The drawings herewith presented show these sup,- porters `or `lumbeiwIb'earers and their saw guidewhich arejmarkedaya,and ,They

have-conneetedt themzawgraduatedarc or curved@ beam A, fwhich@ is arranged with reT `spect3 tothem as, seen igs. `l, `and 2, and made to play in wcurvedirecesses1B, and C,

j @,'uawz ,supporterfils providedfiwith a lenttherefor byw ichjmaybe clamped' t-o the@ graduated \arc.;The1 movable sawi` gulde 'also provided witha suitablelclamp andalsolin Fig.` fLWvhiGhVlisxa Verticaland throughthei saw guide. j

. Figil {8,shows alsectioniof oneotthe clamp j. j WedgesEiD, D, itssupporter and graduated arc,1fsuch section H being `"taken transversely i ojtheyarc andlongitudinally 'throughzf the clamp wedge. The ycl'amnp wedge, E, extends through a box,` F, thatis adapted tothe ,3:17051 so@ as` tdslide `freely' "upon it, `it being clampedythereto by ythewwedge, E. This boxwcarrieswaubearing,G,jby which the saw d, `being `so applied to thernachine as to beca-` i .rableof `beimaturlleolwslewr1?laterally and Set fixed,at` anydpro angle; ..Oneach of supporters a, j s fplaced4 an, edge sup-` Of the "said drawingszlFigure 1,denotes a i j The substantial" partof `my invention `formed respectively fin lathe` two supporters sliding cla-mp wed eDgoriDaor the equiva`` wedge or contrivanceasseen at E, in Fig., 2,`

transverse sectionho" the` machine italien" duide `is supported andl infwhich itfturns, it

porterH, formed as seen in Figs. 1, 2, 3, 5, .p and 6. The `lower surface of said'edge sup* yporter being provided `with `a projection or State off` Maine, have invented certain lip,fI, :arranged asseen in the drawings,

such projecting lip being intended to be guide is adjusted to the middle of the arched beam when the machine is closed together. The ext-ra grooves, b2, are made parallel to the i .MATTHEwsPEAa orBowDoINHAMyMAINE.

porters to propel" POsition's to enable stud Ito `be cut at right angles, when the` Saw' externaledges of the two movable edge pieces i K,1 K, atixed to t-he outer edges of two ,sup-l porters, a, a,and so as as to be capable of `being slid "orinoved toward or away `from one another and fixed in position by means of clamp screws "2,"Z2, arranged as seen lin LFig..9,..Which is an `underside view of the machine.. j By making the bars K, K, movable on their supporters they may be slid up toward `one another so as to extendclose up into the vertex of any angular space to which it may bedesirable to adjust thefmachine preparatory to mitering or abutting with it. The auxiliary grooves `alare for the purpose of mitering at a lessangle, than is formed by the `external edges of thelmachine when closed.

7,Each edge, supporter is provided,` with an i adjustable gage L, constructed as seen in the drawings or`withrafbent or rightangular l, head, k2, which when the machine is used `for miteringto `the supplement of an angle not contained in the scale, N, may be turned down into the position as represented in Figs.` 5, ,6,and7, so as to serve to increase the bearing surface against which the stuff is-to j be placed that is to be mitered, it being understood that such stuit' is to be supported against the inner end of the edge supporter and to project throughthe saw guide.

Fig. 10, represents aside view of one of the'adjustable gages as it appears when reL moved fromits edge supporter. The support block, m2, is provided with a projection or tenon, Z2, :which may be inserted in either of the holes, h2, and when placed in either of said holes, the gage may be used to regulate the length of any piece of stuff to be cut, the said piece being made to abut at one end against the head of said gage while the other is made to overlap the saw guide. The' rod of the gage, L, slides in the support block m2, and is fastened in position by a clamp'- screw a2.

Into one of the inner ends of the supporters, a, andl in front of their oint as seen in Fig. l, there is int-roduced a screw, 02, it being represented by dotted lines. Against this screw the inner end p2, of the other supporter abuts,when the outer edges of the two supporters are brought into a. straight line with each other or the machine opened entirely. In caseof any derangement of the parts ofthe joint of these supporters or any wear of the parts of the machine that would cause the outer edges of the supporters not to range in a straight line,ithe adjusting screw may be set or turned so as to correct the difficulty.

In using the machine, the lumber or stuff that is to be sawed is to be laid upon the supporters, a, a', and so as to extend through the saw guide and made to rest against one or both of t-he edge supporters as the case may be.

To saw stuff at a right angle it should be borne against the inner edges of the edge supporters when their lips are confined 1n the grooves, c2, c2, the machine being entirely opened.

In order to miter a piece of stuff to a right angle, I close the machine entirely, while the lips of the edge supporters are in the grooves c2, c2. In order to miter at a greater angle, the lips of the edge supporters may be placed in the grooves1 b2, the angle being determined by openmg the machine and setting it at the angle required, and when so set, clamping it to the arch beam and moving the saw guide so as to bisect the angle formed between the two clamp wedges D, or D.

The sawing of a piece of stuff at a right angle may also be accomplished by entirely closing the machine and fixing the lips in the grooves f2, f2. The said grooves, f2, f2, are arranged in line with one another and at right angles to the saw guide when the machine is closed. rl`here are two other grooves e2, e2, one being formed 0n each of the supporters, a, a. Each of the said grooves is arranged so that it shall make a right angle with the saw guide when such saw guide is placed in contact with the supporter a, or a, of the opposite groove and the two outer edges of the movable edge pieces K, K, are set at a right angle to each other. The object of the grooves, 02, c2, is to enablea person to cut stuff at any angle to which the outer edges of the machine may be placed. In order to accomplish this, an

edge supporter is fixed in one of the grooves e2, and the saw guide moved up against the lumber supporter, a, or a, then if a piece of wood be placed with one edge against the inner edge of the edge supporter and so as to project through the saw guide, it may be sawed to the angle required by a saw running in the guide and to such angle corresponding with that of the outer faces of the two pieces K, K.

The divisions of the outer index or scale M, are placed at equal distances asunder. Besides this, there is a scale, N, made upon the graduated arc A, and termed the inner index scale. The commencement of this scale is where the inner edge of the right hand clamp, D', intersects the arc, A, when the instrument is closed. The termination or other extremity of this scale is where the said edge of the said clamp intersects the arc, A, when the two outer faces of the edge pieces K are arranged at an angle to each other, which is the supplement to that which they make with one another when the machine is closed. The arc between the two extremes of the scale has its middle division, termed the zero of the scale; such scale being divided into equal divisions or distances,

numbered each way from the said zero or middle division.

The object of the inner index scale, N, is to adjust the machine so as to miter to the supplement of any angle which the outer pieces, K, K, may make with one another. In order to set the machine for such purpose when the pieces K K are arranged at such an angle with each other, observe the distance, on the scale N, from the zero point to the inner side of the wedge, D, then move the lumber supporter of such wedge until the said side of such wedge is at the same distance from the said zero point on the opposite half of the scale N, the saw guide being moved into bisecting the angle formed between the two edge supporters placed in the grooves, b2, b2, the machine will then be ready to miter to the supplement of the angle required.

The inclined recesses, r2, r2, formed in the lumber supporters and the projection, s2, of the horizontal part of the saw guide are for the purpose of enabling the saw guide to be moved backward and turned downward to a mitering angle when the machine is closed. Besides the recesses forming steps for the upright standard, t2, of the saw guide to bear against. I

In Fig. 9, a4, a, denote lips or projections from the underside of the movable pieces,

K, K, the inner edges of these lips being made parallel respectively to the outer edges of the pieces, K, K.

04, c, are dovetail feet which are made to slide into the lower parts of the lumbersupporters and to project from the lower surfaces as seen in the drawings. On removing `these feet `from their dovetailed sockets, the lips a4, amay be used for obtaining the an- "gle `of the edges of any `piece of board "that "angle, or the miter of it.

`.may be placed between them, the same being for adapting the machine' for cutting at such Having thus described I `claim is-`- l. The additional improvement made by my machine what u me, viz,\the sliding index` arch, A, as combined with `the lumber bearers or supporters,

l" l fa, ap', and the saw guide and made to operate therewith essentially asspecifed.`

2. I also claim the combination ofthe eX- grooves e2, and said lumber supporters such being for` the purpose as set forth. 1,

4. I also claim the combination of the ad-` y `justable gage with the edge supporter the same being to determine the length lof the stu' `to bezoperated upon.

5. I claim also the above described mode of constructing the head, 702, of the adjust.

ablev gage so that it ma serve to increase the bearing for the stu during the operationfof mitering the supplement `of an angle as described.

6. I also claim the movable edge pieces, K, K, in combination with the lumber bearers.

7. I also claim combining with the curved arc, A, the inner index scale for the purpose of enabling a person to adjust the machine for the purpose of mitering to the supplement ofany angle required as specified.

8. And I also claim combining with the movable pieces, K, K, the projecting lips, a4, at, the same being for the purpose above specied.

` In testimony whereof I have hereunto set my signature this twenty first day of October A. D. 1854. I

p MATTHEW SPEAR. Witnesses R. I-I. EDD,

F. P. HALE, Jr. 

